Lenovo has finally rolled out Android 5.1 Lollipop OTA (over-the-air) update to its mid-range smartphone, the Lenovo S60, which was launched in March this year with Android 4.4 KitKat, despite many of its competitors being released with the latest firmware.

The Chinese technology giant is rolling out Android 5.1 update to its S60 device via OTA and not the 5.0 version, according to Tech Value (via GSM Arena).

The roll out will be done in phases, so it might take days to reach some owners of Lenovo S60. The file is also said to be heavy – 1.32 GB.

It may be mentioned that the Lenovo S60 was released months after Google launched its new software but it came with Android 4.4 KitKat, surprising many.

It is safer for owners of Lenovo S60 to backup data though the update is not supposed to erase any file. It is also advisable to start downloading the new software only when connected to Wi-Fi as the file is huge - 1.32 GB to be precise.

Users of Lenovo S60 should ideally get Android 5.1 Lollipop update notification when they are connected to Wi-Fi or Internet.

The firmware can be downloaded by selecting download option before pressing 'Install Now' option. The device will restart automatically once installation is done and the software will start running.

One can also manually check the availability of new software by going to – 'Settings' >> 'About phone' >> 'System update' >> 'Check For Update.